Interface description:
5V and 3.3V power input and output interface: commonly used in external power supply, or with other modules for common ground treatment
Micro USB interface: power supply and USB communication, does not support the download.
SWD interface: support for simulation, download and debug.
USART1 interface: USART1 can be used to download the program, or use the USART1 for communication.
MCU pin interface: leads all I / O port pins, easy to connect with peripherals.

Chip Specification:
CS32F103C8T6
Package Type: LQFP;
Number of pins: 48;
Kernel: Cortex-M3;
Operating frequency: 72MHz;
Storage resources: 64K Byte Flash, 20KByte SRAM;
Interface Resources: 2x SPI, 3x USART, 2x I2C, 1x CAN, 37x I / O ports,
Analog-to-digital conversion: 2x ADC (12-bit /16-channel)
Timers: 3 general timers and 1 advanced timer
Debug Download: Support JTAG / SWD debug interface to download, support for IAP.
RT9193: 3.3V regulator chip, the maximum output of 300mA.

Package Included:
2 x STM32F103C8T6 Minimum System Board